t Mg(OH)= Na+S= Ba+O2= K+Br2= Na+O2= C+H2= b+O2= Na+H2= H2+02=
Mg(OH)₂(+t°)→MgO+H₂O 2Na+S→Na₂S Ba+O₂→2BaO 2K+Br₂→2KBr 2Na+O₂→Na₂O₂ C+2H₂→CH₄ 2B+O₂→2BO 2Na+H₂→2NaH 2H₂+O₂→2H₂O